Can someone confirm that APLX142AAQ is the part?
Greg
On Mon, Jun 24, 2019, 5:19 PM Kurt McCullum wrote:
> Thanks a million Steve! Those are the two pins.
>
> 10 15
> 00 = Bank 1
> 01 = Bank 2
> 11 = Bank 3
>
> Based on that, I'm going to tie off of
Thanks a million Steve! Those are the two pins.
10 15
0 0 = Bank 1
0 1 = Bank 2
1 1 = Bank 3
Based on that, I'm going to tie off of pin 15 to get the ROM switching I'm
looking for.
Kurt
On Mon, Jun 24, 2019, at 2:45 PM, Stephen Adolph wrote:
> U11 pin 10 and pin 15. I think bank 2 occurs
Thanks for digging that out Steve. I'll double check it later tonight. I've
only played with Bank2 replacing the main ROM one time. I guess it's useful for
developing a replacement system ROM but other than that I don't know what one
would do with that feature.
Kurt
On Mon, Jun 24, 2019, at
U11 pin 10 and pin 15. I think bank 2 occurs when
Pin 15 is 0 and pin 10 is one.
U53 pin 10 should indicate when bank 2 ram is in use as an upper ram block.
Bank 2 ram can replace the Roms also in the lower 32k.
On Monday, June 24, 2019, Kurt McCullum wrote:
> Thanks Steve. I pulled out the
Thanks Steve. I pulled out the tech manual and it does seem like that is the
right pin. I've got a unit split open so I'll check later tonight to see if
it's pulsing as Brian suggested. Could be the case. From the diagram, I was
hoping it would be 5v when selected and 0v when grounded.
Kurt
Maybe it's pulsing.
--
bkw
On 6/24/19 11:35 AM, Kurt McCullum wrote:
Initial inspection of pin 8 on u38 gives me 5.5v when bank 2 is
selected and 3.5v when bank 1 is selected. Strange results but I'll
keep digging.
Kurt
I'll take another look tonight..
On Mon, Jun 24, 2019 at 11:36 AM Kurt McCullum wrote:
> Initial inspection of pin 8 on u38 gives me 5.5v when bank 2 is selected
> and 3.5v when bank 1 is selected. Strange results but I'll keep digging.
>
> Kurt
>
> On Sun, Jun 23, 2019, at 7:35 PM, Kurt
sounds like you should return it, and get a gurumodem or wifi232 or
wimodem232 those all work and are tested,, i have the guru's in stock at
arcadeshopper.com
On Sat, Jun 22, 2019 at 5:43 PM Jason Benson
wrote:
> I've tried with a null modem and a standard serial cable. I was able to
> access
